Systems and methods for speckle reduction through bandwidth enhancement

摘要

A laser imaging system with reduced speckle is disclosed. The laser imaging system includes spatially superpositioned 1-D arrays or alternatively 2-D arrays of independent emitters of laser radiation, with each emitter having a spectral bandwidth Deltalambda_i centered at some arbitrary wavelength lambda_0i. The elements of the array are allowed, by design, to have a slightly different central wavelength, thereby creating an ensemble bandwidth DeltaLambda which is much greater than the bandwidth Deltalambda_i of any individual emitter in the array. The resulting increased bandwidth reduces speckle in a displayed image.